31. Avogadros number may represent_________________?
A. volume of particles
B. number of particles
C. mass of particles
D. All of the above
32. Size of molecule depends upon________________?
A. Atomicity
B. Shape of molecule
C. Both A and B
D. Difficult to predict
33. Which of the following terms is used for the mass of chlorine 35.5 ?
A. relative atomic mass
B. mass number
C. atomic weight
D. relative isotopic mass
34. Which one of the following is not the mono isotopic element ?
A. arsenic
B. uranium
C. iodine
D. nickel
35. a.m.u =__________________?
A. 1.6 x 10-27 kg
B. 1.6 x 10-24 kg
C. 1.6 x 10-26 kg
D. 1.6 x 10-28 kg
36. Which of the following are iso electronic species ?
A. H+ H H-
B. Li+ Na+ K+
C. C1- Br- I
D. F- Ne Na+
37. Molecular ions are formed by passing______________________?
A. High energy electron beam
B. ? – particle
C. X-rays
D. All of the above
38. Which one is true about isotope ?
A. Same number of neutrons
B. Same mass number
C. Same physical properties
D. Same chemical properties
39. Which of the following ion formation is always exothermic ?
A. Uni-negative
B. Uni-positive
C. Di-negative
D. Di-positive
40. The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer_________________?
A. Gas
B. Liquid
C. Volatile solid
D. All